<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>太极图</title>
    <style>
        .wihteBig {
            position: relative;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background-color: #fff;
            border: 1px solid #000;
            overflow: hidden;
            transition: all 2s ease-in-out;
        }
        
        .blackMid {
            position: absolute;
            bottom: 0;
            left: 75px;
            content: "";
            width: 50%;
            height: 50%;
            border-radius: 50%;
            background-color: black;
        }
        
        .whiteDot {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: #fff;
            z-index: 3;
        }
        
        .blackBig {
            width: 50%;
            height: 300px;
            position: absolute;
            background-color: black;
            border: 1px solid #000;
            left: 50%;
        }
        
        .whiteMid {
            position: absolute;
            top: -1px;
            right: 75px;
            content: "";
            width: 150px;
            height: 150px;
            border-radius: 50%;
            background-color: #fff;
        }
        
        .blackDot {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: #000;
            z-index: 3;
        }
        
        .wihteBig:hover {
            cursor: pointer;
            transform: rotate(720deg) scale(.5);
        }
    </style>
</head>

<body>
    <div class="wihteBig">
        <div class="blackMid">
            <div class="whiteDot"></div>
        </div>
        <div class="blackBig">
            <div class="whiteMid">
                <div class="blackDot"></div>
            </div>
        </div>
    </div>
</body>

</html>